December 2010
Intermediate to advanced
363 pages
12h 21m
English
book
Pro PHP Security: From Application Security Principles to the Implementation of XSS Defenses, Second Edition
by Chris Snyder, Michael Southwell, Thomas Myer
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How Remote Execution Works
A remote execution attack aims to take direct control of your application by exploiting a scriptable interface within it. One such interface common to many PHP applications is a template system. Template systems provide a mechanism by which value placeholders in markup are replaced by actual values from your application. One of the easiest ways to do this is to use PHP's $variable notation throughout the template, so that passing the template through eval() replaces the variables with the actual values. In that case, the attacker can simply embed PHP code in submitted text, and the template system will execute it.
The main avenue for remote execution is user input that is used as part of a shell command, as when a PHP ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.